html agility pack parse table

问题

I have a table like this:

<table border="0" cellpadding="0" cellspacing="0" id="table2">
    <tr>
        <th>Name
        </th>
        <th>Age
        </th>
    </tr>
        <tr>
        <td>Mario
        </td>
        <th>Age: 78
        </td>
    </tr>
            <tr>
        <td>Jane
        </td>
        <td>Age: 67
        </td>
    </tr>
            <tr>
        <td>James
        </td>
        <th>Age: 92
        </td>
    </tr>
</table>

and I am using html agility pack to parse it. I have tried this code but it is not returning expected results: Here is the code:

foreach (HtmlNode tr in doc.DocumentNode.SelectNodes("//table[@id='table2']//tr"))
            {
                //looping on each row, get col1 and col2 of each row
                HtmlNodeCollection tds = tr.SelectNodes("td");
                for (int i = 0; i < tds.Count; i++)
                {
                    Response.Write(tds[i].InnerText);
                }
            }

I am getting each column because I would like to do some processing on the contents returned.

What am I doing wrong?

回答1:

You can grab the cell content from within your outer foreach loop:

foreach (HtmlNode td in doc.DocumentNode.SelectNodes("//table[@id='table2']//tr//td"))  
{  
    Response.Write(td.InnerText);   
}

Also I'd recommend trimming and 'de-entitizing the inner text to ensure it is clean:

Response.Write(HtmlEntity.DeEntitize(td.InnerText).Trim())

In your source the cells for [Age: 78] and [Age: 92] have a <th> tag at the start instead of <td>

回答2:

This is my solution. Please notice your HTML is not well formatted because you have TH where TD should be:

<table border="0" cellpadding="0" cellspacing="0" id="table2">
    <tr>
        <th>Name
        </th>
        <th>Age
        </th>
    </tr>
        <tr>
        <td>Mario
        </td>
        <td>Age: 78
        </td>
    </tr>
            <tr>
        <td>Jane
        </td>
        <td>Age: 67
        </td>
    </tr>
            <tr>
        <td>James
        </td>
        <td>Age: 92
        </td>
    </tr>
</table>

And this is the c# Code:

using HtmlAgilityPack;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {

            HtmlAgilityPack.HtmlDocument document = new HtmlAgilityPack.HtmlDocument();
            document.Load("page.html");

            List<HtmlNode> x = document.GetElementbyId("table2").Elements("tr").ToList();

            foreach (HtmlNode node in x)
            {
                List<HtmlNode> s = node.Elements("td").ToList();
                foreach (HtmlNode item in s)
                {
                    Console.WriteLine("TD Value: " + item.InnerText);
                }
            }
            Console.ReadLine();
        }
    }
}

Screenshot:

Edit: I must add that if you are going to use the <th> tags you must include them inside a <thead> tag, and then your rows inside of a <tbody> tag so that your html is well formatted :)

More info: http://www.w3schools.com/tags/tag_thead.asp

来源：https://stackoverflow.com/questions/14987878/html-agility-pack-parse-table

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html-agility-pack